The average of the marks obtained in an examination by 8 students was 51 and by 9 other students was 68. The average marks of all 17 students was: 

At what rate percent per annum will a sum of Rs.5000 amount to Rs.6000 in 4 years?

A train travelling at the speed of 50 kmph leaves from a station. Another train travelling at speed of 60 kmph leaves the same station after 7 hours in the same direction. They will meet after what distance?

In the figure below, AB is a chord of a circle with centre O. A tangent AT is drawn at point A so that ∠BAT=50°.Then ∠ADB=?

In the given figure AB, BC and CA is a tangent of a circle if BC=6.3 cm and MC=2.7 cm then the Value of BL is                                                                

40 % are the passing marks. A student gets 250 marks yet fails by 38 marks. What are the maximum marks? 

Direction: Study the double bar graph given below and answer the questions.

The average of the number of students participating in cultural events is:

(53×87+159×21+106×25) is equal to